What brand pistons are you running, and do you have piston slap when cold and warm?

[geardriven74]

I'm getting ready to buy pistons for my teksid and trying to decide on a brand.

Thanks in advance.

 

[ElscottHavoc]

I have Diamond pistons, but don't remember what the specs are or what rings were used.

Will look it up when I get home. I have some slight slap, but it doesn't take long to go away. I thought forged parts were loader anyways.

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[Brutal Metal]

There's a number of good pistons for the Modular, Diamond, Manley,CP,Probe...
I have no noise..

 

[97snakebite]

what does piston slap sound like?

 

[geardriven74]

what does piston slap sound like?

It sounds like a light knock to me. I have an 01 Chevy 5.3 that does it when its cold. It stops once the engine is warm.

 

[geardriven74]

I have Diamond pistons, but don't remember what the specs are or what rings were used.

Will look it up when I get home. I have some slight slap, but it doesn't take long to go away. I thought forged parts were loader anyways.

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Ok. Thanks

 

[01yellercobra]

Diamond pistons here with Total Seal rings. No piston slap.

 

[Shaunk]

We have used manley,cp,diamond,probe and many others with zero issues. But if your shooting for a higher hp number and going to run significant boost your builder "may" open up the ptw and you could experience some cold start noise.

 

[geardriven74]

Anybody else experienced piston slap after rebuild?

 

[Top Fuel Friday]

I had probe pistons and they worked fine.

 

[na svt]

Any piston will have "slap" if the clearances are too large. Conversely, all pistons won't have slap if the clearances are correct.

 

[Shaunk]

The piston slap noise could be made worse if your machinist does not use a torque plate when final honing the blocks. On modulars I have seen/measured some blocks will move certain cylinders around a lot!

 

[geardriven74]

Any piston will have "slap" if the clearances are too large. Conversely, all pistons won't have slap if the clearances are correct.

Some are experiencing piston slap when clearances are at manufacturers specs.

 

[tmhutch]

Some pistons have to slap because of their design. A properly setup, high strength 2618 alloy piston will have piston slap. If it doesn't, somethings wrong.

For a naturally aspirated engine that is not subjected to severe detonation, a lower strength 4032 alloy forged aluminum piston will have no problem supporting 500+ rwhp and 8,000 RPM, and they won't knock at start up because they dont expand as much as 2618. An added bonus is they weigh less so free up more horsepower.

 

[MT0911]

I've had great luck with CP 2618 Pistons at 700whp. Very little slap on cold starts but quiet for the most part. Piston slap is pretty normal to an extent. Just make sure your clearances are good.

 

[ElscottHavoc]

The piston slap noise could be made worse if your machinist does not use a torque plate when final honing the blocks. On modulars I have seen/measured some blocks will move certain cylinders around a lot!

And if you don't use s torque plate, you'll probably have significant blow by to compliment the slap.

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[geardriven74]

And if you don't use s torque plate, you'll probably have significant blow by to compliment the slap.

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Thanks for the good info. I am using torque plates. Trying to do it right

 

[99cobra09]

I'm using custom racetek pistons.